The microstructures of an Fe-20Mn-2Si-2Al twinning-induced plasticity steel deformed at various temperatures were characterized by X-ray diffraction and transmission electron microscopy. Based upon microstructural features revealed at various characteristic temperature regions of deformation, the necessary and sufficient conditions of twinning-induced plasticity effect were proposed. Likewise, the competitive characteristic deformation mechanism occurring in this twinning-induced plasticity steel was presented and considered qualitatively in terms of phase stability and stacking fault energy of the austenitic matrix.

On the Deformation Mechanism of Twinning-Induced Plasticity Steel. X.D.Wang, B.X.Huang, Y.H.Rong: Philosophical Magazine Letters, 2008, 88[11], 845-51